v2.0.1 Brodcast delay extended & auto download configurable

Improvements

• Broadcast delay up to 5 minutes — Live Timing Offset slider now extends to -5m (previously -60s) to accommodate longer streaming-service lag, with M:SS formatting and ±30s quick-adjust buttons
• Configurable auto-precompute — new AUTO_PRECOMPUTE env var controls which session types the background task fetches during race weekends. Accepts off, race, race+qual (default), or all. Self-hosters who don't watch practice can avoid downloading FP1/FP2/FP3 data; sessions outside the configured set are still available on-demand

v2.0.0 - Unified single-container architecture

2.0.0

Migrating from v1.x

The Docker image has changed. The old f1replaytiming-backend and f1replaytiming-frontend images will no longer receive updates. The new image is ghcr.io/adn8naiagent/f1replaytiming:latest (single unified image).

To migrate:

1. Pull the new image: docker pull ghcr.io/adn8naiagent/f1replaytiming:latest
2. Copy .env.example to .env and configure (most defaults work out of the box)
3. Replace your docker-compose.yml with the one from the repo. It's now a single service on one port
4. docker compose up

You no longer need NEXT_PUBLIC_API_URL, FRONTEND_URL, or any CORS settings. Your session data volume carries over as-is, no reprocessing needed.

Breaking Changes

• Single container architecture — frontend and backend are now merged into a single Docker container serving everything from one port. The separate frontend and backend containers have been removed
• Simplified configuration — all config is now in a single .env file. NEXT_PUBLIC_API_URL, FRONTEND_URL, and CORS configuration are no longer needed
• Static frontend — Next.js switched from output: 'standalone' to output: 'export', producing static HTML/CSS/JS served by FastAPI. No Node.js runtime in the final image
• URL format change — dynamic routes (/replay/2026/5) replaced with query parameters (/replay?year=2026&round=5&type=R). Old URLs redirect automatically

Improvements

• No CORS — frontend and API are the same origin, eliminating all cross-origin issues
• Reverse proxy friendly — single port means Traefik, nginx, and Cloudflare tunnels just work with no special configuration
• WebSocket reliability — same-origin WebSocket connections no longer break behind TLS termination or mixed protocol proxies
• Screen wake lock — prevents screen dimming and device sleep during replay playback and live sessions

1.3.2.2 Fix Replay timing drift

Fix

• Replay timing drift — replaced fixed-duration sleeps with wall-clock-anchored playback to prevent timing drift during sessions (contributed by @stephenwilley)

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1.3.2.1

Fixes

• Lap analysis lap number — fixed showing incomplete current lap data; now only displays completed laps

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1.3.2

Improvements

• Practice sector indicators — live sector colours and track map sector overlay now available in practice sessions. Requires recompute
• Last lap time for all sessions — now available in practice and qualifying. Requires recompute
• Last lap colour coding — purple for fastest lap, green for personal best
• Processing feedback — real-time status messages during on-demand processing
• Broadcast delay modal — redesigned with quick adjust buttons and exact entry
• Open all data panels — toggle in Settings > Other to open telemetry, race control, and lap analysis (race only) in a single click. Closes automatically when any panel is hidden
• Persistent panel layout — panel states (telemetry, race control, lap analysis, sectors) are remembered per session type (race, qualifying, practice) across page loads
• High contrast text — toggle in Settings > Other for white text on muted elements

Fixes

• Practice session precompute — fixed timestamp alignment for practice sessions causing leaderboard to show future data. Requires recompute
• Practice session time — countdown aligned to 60-minute session duration, not overall replay length
• Mobile qualifying time — now shows remaining time counting down, matching desktop
• PiP leaderboard scroll — leaderboard no longer cut off by playback controls
• Minor UI layout fixes — spacing and alignment across mobile, tablet, and desktop

v1.3.2.1 fix: current lap times showing in lap analysis panel

fix: showing current lap data in lap analysis panel before lap is completed) - now only displays completed laps

1.3.2

Improvements

• Practice sector indicators — live sector colours and track map sector overlay now available in practice sessions. Requires recompute
• Last lap time for all sessions — now available in practice and qualifying. Requires recompute
• Last lap colour coding — purple for fastest lap, green for personal best
• Processing feedback — real-time status messages during on-demand processing
• Broadcast delay modal — redesigned with quick adjust buttons and exact entry
• Open all data panels — toggle in Settings > Other to open telemetry, race control, and lap analysis (race only) in a single click. Closes automatically when any panel is hidden
• Persistent panel layout — panel states (telemetry, race control, lap analysis, sectors) are remembered per session type (race, qualifying, practice) across page loads
• High contrast text — toggle in Settings > Other for white text on muted elements

Fixes

• Practice session precompute — fixed timestamp alignment for practice sessions causing leaderboard to show future data. Requires recompute
• Practice session time — countdown aligned to 60-minute session duration, not overall replay length
• Mobile qualifying time — now shows remaining time counting down, matching desktop
• PiP leaderboard scroll — leaderboard no longer cut off by playback controls
• Minor UI layout fixes — spacing and alignment across mobile, tablet, and desktop

v1.3.2 Practice session improvements, all-panel view, and layout persistence

Improvements

• Practice sector indicators — live sector colours and track map sector overlay now available in practice sessions. Requires recompute
• Last lap time for all sessions — now available in practice and qualifying. Requires recompute
• Last lap colour coding — purple for fastest lap, green for personal best
• Processing feedback — real-time status messages during on-demand processing
• Broadcast delay modal — redesigned with quick adjust buttons and exact entry
• Open all data panels — toggle in Settings > Other to open telemetry, race control, and lap analysis (race only) in a single click. Closes automatically when any panel is hidden
• Persistent panel layout — panel states (telemetry, race control, lap analysis, sectors) are remembered per session type (race, qualifying, practice) across page loads
• High contrast text — toggle in Settings > Other for white text on muted elements

Fixes

• Practice session precompute — fixed timestamp alignment for practice sessions causing leaderboard to show future data. Requires recompute
• Practice session time — countdown aligned to 60-minute session duration, not overall replay length
• Mobile qualifying time — now shows remaining time counting down, matching desktop
• PiP leaderboard scroll — leaderboard no longer cut off by playback controls
• Minor UI layout fixes — spacing and alignment across mobile, tablet, and desktop

1.3.1 - UI Bug Fixes

• Tablet/Medium screen UI improvements

1.3.0 Lap analysis, last lap times, and mobile refinements

New Features

• Lap Analysis panel (Beta) — compare lap times for up to two drivers with a line chart and full lap-by-lap history. Accessible via the Laps button on the track map on desktop, or as a collapsible section on mobile. Race replay only
• Last lap time column — shows each driver's most recently completed lap time on the race leaderboard, toggleable in settings. Race replay only
• Leaderboard tooltips — hover over any column value to see what it is (e.g. "Interval to car ahead", "Tyre age", "Last lap time")

Improvements

• Info button on mobile — the features/info link is now visible in the mobile header
• Features page opens in new tab — no longer interrupts an active replay session

Fixes

• Mobile qualifying sectors — sector overlay toggle and driver selection buttons now available on mobile track map, previously desktop-only
• Mobile leaderboard spacing — improved UI layout for mobile Leaderboard

1.2.3 Track detail, telemetry expansion, and race finish improvements

New Features

• Marshal sector flags — localised yellow/double yellow flags on the track map at marshal sector positions. Requires recompute
• Corner numbers — turn numbers shown on the track map from FastF1 circuit data. Toggleable in settings. Requires recompute
• Expanded telemetry — unlimited driver selection. 3+ drivers open a moveable side panel with pinnable race control
• Draggable race control — RC panel can be repositioned anywhere on the track map
• RC sound notification — optional alert sound for new race control messages
• Full screen mode — hides session banner and enters browser fullscreen
• Imperial units — toggle for °F, mph in settings
• Pit stop timer — live count-up shown in gap column while driver is in pit lane. Requires recompute

Improvements

• Pit prediction accuracy — recalculated using precise pit lane timestamps. Unified 73% SC/VSC factor
• Qualifying sector selection — sector overlay buttons for all selected drivers
• Settings modal — redesigned as tabbed sidebar (Leaderboard, Weather, Track Map, Race Control, Other)
• Features page — consolidated with info panel content

Fixes

• Race finish — drivers stay on leaderboard at classified position with chequered flag icon. Requires recompute
• Track map bounds — drivers no longer fly off screen with invalid position data
• iPad viewport — layout accounts for browser address bar
• PiP on iOS — hidden on unsupported devices

1.2.2 Memory management, live timing fixes, UI improvements

Improvements

• Mobile race control added collapsible race control messages section to mobile view for both live and replay
• <1sec interval highlight intervals under 1 second are highlighted in green during race sessions (toggleable in settings)
• Live session styling improved pulse animation on live indicators and cleaner live session button layout (contributed by @Clav3rbot)
• Broadcast delay added manual input field for exact delay value
• UI/UX improvements main page layout changed to expandable list, fixed minor UI bugs on navigation

Fixes

• Memory management replay session data is now evicted from memory 5 minutes after the last client disconnects (thanks @matze939939 for raising and @Clav3rbot for contributing fix).
• Live race control messages fixed race control messages not updating during live sessions when broadcast delay is set
• Phantom tyre compounds fixed incorrect tyre history in live sessions caused by interim/placeholder compound updates from the F1 feed
• Live qualifying sectors fixed sector indicators not clearing after lap completion (now clears after 5 seconds) and fixed multiple drivers showing purple in the same sector by computing colours from actual times
• Session times corrected session times to display local date with time

Fix self-hosting connection and Docker URL issues

Fixes

• Connection error screen - when the frontend cannot reach the backend, a clear error message is now shown instead of the passphrase screen, with the attempted URL and troubleshooting tips
• Runtime API URL for Docker - NEXT_PUBLIC_API_URL can now be set as a runtime environment variable on the frontend container, so pre-built Docker images work with any backend URL without rebuilding. See the README for details
• Fixed loading overlay staying visible when navigating back to the session picker

New Features

• Red flag countdown and skip - during red flag periods in replay mode, a countdown timer shows how long until the session resumes, with a button to skip ahead to the restart